Vertiv Liebert DSE Installer/User Manual
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Vertiv Liebert DSE Installer/User Manual

Thermal management system downflow 50 to165 kw (14 to 47 ton) capacity; upflow 80 to 85 kw (23 to 24 ton) capacity, 50 and 60 hz
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Liebert®
DSE™ Thermal Management System
Installer/User Guide
Downflow 50 to 165 kW (14 to 47 ton) Capacity; Upflow 80 to 85 kW 
(23 to 24 ton) Capacity, 50 and 60 Hz

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Summary of Contents for Vertiv Liebert DSE

  • Page 1 Liebert® DSE™ Thermal Management System Installer/User Guide Downflow 50 to 165 kW (14 to 47 ton) Capacity; Upflow 80 to 85 kW  (23 to 24 ton) Capacity, 50 and 60 Hz...
  • Page 2 The products covered by this instruction manual are manufactured and/or sold by Vertiv This document is the property of Vertiv and contains confidential and proprietary information owned by Vertiv. Any copying, use or disclosure of it without the written permission of Vertiv is strictly prohibited.

  • Page 3: Table Of Contents

    7.2.2 Upflow Unit Plenums with EC Fans 8 Checklist for Completed Installation 8.1 Moving and Placing Equipment 8.2 Electrical Installation Checks 8.3 Piping Installation Checks 8.4 Other Installation Checks 9 Initial Start-up Checks and Commissioning Procedure for Warranty Inspection Vertiv | Liebert® DSE™ Installer/User Guide |...
  • Page 4 10.7.6 Replacing the Compressor 10.8 Evaporator Coil Performance 10.9 Air-Cooled Condenser Maintenance 11 Preventive Maintenance Checklist Appendices Appendix A: Technical Support and Contacts Appendix B: Disassembling the DSE for Transport Appendix C: Submittal Drawings Vertiv | Liebert® DSE™ Installer/User Guide |...

  • Page 5: Important Safety Instructions

    1 IMPORTANT SAFETY INSTRUCTIONS SAVE THESE INSTRUCTIONS This manual contains important safety instructions that should be followed during the installation and maintenance of the Liebert® DSE. Read this manual thoroughly before attempting to install or operate this unit. Only qualified personnel should move, install or service this equipment. Adhere to all warnings, cautions, notices and installation, operating and safety instructions on the unit and in this manual.
  • Page 6 CAUTION: Risk of contact with sharp edges, splinters, and exposed fasteners. Can cause injury. Only properly trained and qualified personnel wearing appropriate, OSHA-approved PPE should attempt to move, lift, remove packaging from or prepare the unit for installation. Vertiv | Liebert® DSE™ Installer/User Guide...
  • Page 7 CAUTION: Risk of contact with hot surfaces. Can cause injury. The compressor, refrigerant discharge lines, fan motor, and some electrical components are extremely hot during unit operation. Allow sufficient time for them to cool to a touch-safe temperature before working within the unit cabinet.
  • Page 8 Do not use completely demineralized water with this unit. The water must contain minerals for the electrode principle to work. Do not use a hot water source. It will cause deposits that will eventually block the fill-valve opening. Vertiv | Liebert® DSE™ Installer/User Guide...
  • Page 9 NOTICE Risk of water backing up in the drain line. Leaking and overflowing water can cause equipment and building damage. Do not install an external trap in the drain line. This line already has a factory-installed trap inside the cabinet. Installation of a second trap will prevent drain-water flow and will cause the water to overflow the drain pan.
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  • Page 11: Nomenclature And Components

    2 NOMENCLATURE AND COMPONENTS This section describes the model-number configuration for Liebert® DSE units and components. 2.1 Liebert DSE Model-number Nomenclature Table 2.2 below describes each digit of the model number. Table 2.1 DSE Model Number Example Model Number Digits 11 to...
  • Page 12 D = Option package #1 plus remote humidifier lockout E = Option package #1 plus reheat/humidifier lockout plus remote contact F = Remote humidity contact plus reheat/humidifier lockout Digit 19 = Monitoring B = Base comms and connectivity Vertiv | Liebert® DSE™ Installer/User Guide...

  • Page 13: Component Location

    Table 2.2 DSE Model-number Digit Definitions (continued) Digit Description Digit 20 = Sensors 0 = None S = Smoke sensor H = High-temperature sensor F = Smoke and High-temperature sensors C = Compressor-overload sensors A = Compressor, high-temperature sensors D = Compressor, smoke sensors K = Compressor, high-temperature, smoke sensors Digit 21 = Packaging P = Domestic...
  • Page 14 Air-cooled— configured as a DX-only system (no economization). Liebert® DSE™ Thermal Management System Liebert® EconoPhase™ Pumped-refrigerant Economizer Liebert® MC™ Condenser with DSE receivers. Vertiv | Liebert® DSE™ Installer/User Guide...
  • Page 15 Figure 2.2 DSE with Liebert® MCV Condenser and EconoPhase Pumping Unit Table 2.5 DSE Air-cooled with MCV Condenser and EconoPhase Pump Cooling Descriptions Item Description Air-cooled with Liebert® MCV™ Condenser with Econo-Phase™ Pumping Unit—All the features of a standard air-cooled system, with the added benefit of an economizer mode that can be used when the outdoor temperature is cold enough to cool the refrigerant enough to suspend use of the compressors.
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  • Page 17: Pre-Installation Preparation And Guidelines

    • Allow at least the minimum recommended clearances for maintenance and service. See the appropriate submittal drawings for dimensions. We recommend installing an under-floor water detection system. Contact your Vertiv representative for information. 3.1 Planning Dimensions The unit, floor stand, and plenum dimensions are described in the submittal documents included in the Submittal Drawings on page 93.

  • Page 18: Air-Distribution Considerations For Downflow Units

    Ensure that there is adequate clearance above the unit for service, such as replacing filters. • Optional plenums are available for downflow unit ducting. Figure 3.1 Downflow unit field-installed ducting and plenum ducting for DA125, DA150 and DA165 Vertiv | Liebert® DSE™ Installer/User Guide...

  • Page 19: Air-Distribution Considerations For Upflow Units

    Submittal Drawings on page 93. • If seismic requirements apply, consult your Vertiv representative for information about a seismic-rated floor stand. NOTE: Seal openings around piping and electrical connection to prevent air leakage. Failure to do so could reduce the unit’s cooling performance.

  • Page 20: Operating Conditions

    59°F (15°C). The recommended minimum return-air temperature setpoint for the DSE is 75°F (24°C). Operating outside this envelope can decrease equipment reliability. NOTE: If running in supply-air control, the minimum supply-air setpoint is 64°F (18°C). Vertiv | Liebert® DSE™ Installer/User Guide...

  • Page 21: Heating

    DA050 Dehumidification Control The DA050 is designed to maximize sensible cooling not latent cooling loads. The room load must be at least 37.6 kW (74% of unit capacity) to prevent over cooling the room at 85°F (29°C) return air temperature while in dehumidification mode. If the room load is too low to maintain the setpoint, the compressor will cycle On and Off.

  • Page 22: Humidification Control

    (3048 X 1143 X 2159) (3048 X 1143 X 2172) DA080U*P DA085U*A 120 X 45 X 85 120 X 45 X 85.5 2370 (1075) 2570 (1166) 2150 (975) (3048 X 1143 X 2159) (3048 X 1143 X 2172) DA085U*P Vertiv | Liebert® DSE™ Installer/User Guide...

  • Page 23: Equipment Inspection And Handling

    • Carefully inspect all items for visible or concealed damage. • Report damage immediately to the carrier and file a damage claim with a copy sent to Vertiv or to your sales representative. Equipment Recommended for Handling the Unit: •...

  • Page 24: Handling The Unit While Packaged

    20 ft (5 m) or farther from the unit. • Always refer to the location of the center-of-gravity indicators when lifting the unit, see Figure 4.1 below. Figure 4.1 Center-of-gravity indicator Vertiv | Liebert® DSE™ Installer/User Guide...

  • Page 25: Unpacking The Unit

    4.3 Unpacking the Unit Remove the exterior stretch wrap packaging and two V-shaped boards from around the unit, as shown in Figure 4.2 below. NOTE: The bag may remain in place to protect from dust and to protect the unit panels, or it may be removed for immediate installation.

  • Page 26: Removing The Unit From The Skid Using Rigging

    2. Place the slings and between the bottom rails of the unit and the skid as shown in Figure 4.4 on the facing page. NOTE: Unit is shown without packaging. These instructions may be followed with or without the outer packaging in place. Vertiv | Liebert® DSE™ Installer/User Guide...
  • Page 27 Figure 4.4 Example sling placement Item Description Distance between sling and center-of-gravity marker equal to item 2. Distance between sling and center-of-gravity marker equal to item 1. 4 Equipment Inspection and Handling...

  • Page 28: Moving The Unit To The Installation Location Using Piano Jacks

    With the unit elevated, position piano jacks at each end of the unit. 2. Lower the unit to a height suitable for the piano jacks, place protective material between the unit and the piano jacks and straps. Vertiv | Liebert® DSE™ Installer/User Guide...
  • Page 29 3. With the unit secured to the piano jacks, move the forklift away from the unit. 4. Using the piano jacks, at least two trained personnel can move the unit to the site for installation. • For location considerations, refer to Pre-installation Preparation and Guidelines.

  • Page 30: Placing The Unit On A Floor Stand

    EC fans. Unless the floor stand is installed in the correct position, the fans will not lower into the floor stand. Figure 4.7 Welded tabs on floor stand Item Description Front of unit Vertiv | Liebert® DSE™ Installer/User Guide...

  • Page 31: Piping And Refrigerant Requirements

    5 PIPING AND REFRIGERANT REQUIREMENTS All fluid and refrigeration connections to the unit, with the exception of the condensate drain, are sweat copper. Factory-installed piping brackets must not be removed. Field-installed piping must be installed in accordance with local codes and must be properly assembled, supported, isolated and insulated. Avoid piping runs through noise-sensitive areas, such as office walls and conference rooms.

  • Page 32: Drain And Humidifier Fluid Piping

    212°F (100°C). • The drain line must comply with all applicable codes. • On units with the optional, factory-installed condensate pump, see Factory-installed Condensate Pump on page 34 and Condensate-pump Drain Line Requirements on page 34. Vertiv | Liebert® DSE™ Installer/User Guide...
  • Page 33 Figure 5.1 Correct and Incorrect gravity drains for downflow and upflow units Table 5.3 Gravity-fed Drain Line Figure Descriptions Item Description For downflow units For upflow units Correct drain installation Incorrect drain installation Internal drain External drain Continuous downward slope External trap.

  • Page 34: Condensate-Pump Drain Line Requirements

    1/4-in. supply line, maximum water pressure is 150 psi (1034 kPa). • Size supply line for 1 gpm (3.8 l/m), with a minimum water pressure of 20 psi (138 kPa). • Do not supply de-ionized water to the humidifier. Vertiv | Liebert® DSE™ Installer/User Guide...

  • Page 35: Refrigerant Piping And Charging

    5.2 Refrigerant Piping and Charging WARNING! Risk of over-pressurization of the refrigeration system. Can cause explosive discharge of high-pressure refrigerant, loss of refrigerant, environmental pollution, equipment damage, injury, or death. This unit contains fluids and gases under high pressure. Use extreme caution when charging the refrigerant system.

  • Page 36: Refrigerant Line Sizes And Equivalent Lengths

    1-3/8 1-3/8 1-1/8 450 ft (137 m)* 1-1/8 1-1/8 1-3/8 1-3/8 1-1/8 *Consult factory when actual pipe length between condenser/EconoPhase and Liebert DSE unit will exceed 300 ft (91 m). Source: DPN000788. Rev. 11 Vertiv | Liebert® DSE™ Installer/User Guide...

  • Page 37: Refrigerant Charge Requirements For Air-Cooled Systems

    25 (11.3) *System Charge = indoor unit + condenser + refrigerant receiver + refrigerant lines. For system charges over 200 lb. (90.7 kg), consult your Vertiv representative. See Table 10.3 on page 70 for the recommended oil for the system. Source: DPN003950 Rev. 3 Table 5.6 Condenser Refrigerant Charge for R-410A Per Circuit Including PRE Including Receiver...

  • Page 38: Additional Oil Requirements For Scroll And Digital-Scroll Compressors

    Do not mix oils of different viscosities. • Consult your local sales representative, Vertiv product support at 1-800-543-2778, or the compressor manufacturer if questions arise. See Table 5.9 on the facing page, for the amount required for various system charge levels.
  • Page 39 Figure 5.2 Standard-formed Tube Trap Versus Straight-tubes-and-fittings Trap Item Description Standard-formed tube trap Straight tubes and fittings trap Table 5.9 Additional Oil Required per Refrigerant Charge Model Refrigerant System Charge DA050 DA080 DA085 DA125 DA150 DA165 Per Circuit, lb (kg) * Additional Oil Required Per Circuit, oz (ml) <...

  • Page 40: Evacuation, Leak-Testing, And Charging Air-Cooled Systems With Receivers

    138 (4080) *System Charge = indoor unit + condenser + refrigerant receiver + refrigerant lines. For system charges over 200 lb. (90.7 kg), consult your Vertiv representative. See 10.7 on page 70 for the recommended oil for the system. Source: DPN003950 Rev. 5 Table 5.10 Volume of Oil in Standard-form Trap by Pipe Diameter...
  • Page 41 Starting with Circuit #1, open the service valves and place a 150 PSIG (1034 kPa) of dry nitrogen with a tracer of refrigerant. Check system for leaks with a suitable leak detector. 2. With pressure still in Circuit #1, open the compressor service valves in Circuit #2. •...
  • Page 42 65°F and 75°F (18°C and 24°C): • 40°F (4.5°C) and lower—Charge to the bottom of the top sight glass. • 40°F (4.5°C) and higher—top sight glass is 1/4 full Vertiv | Liebert® DSE™ Installer/User Guide...

  • Page 43: Electrical Connections

    6 ELECTRICAL CONNECTIONS Three-phase electrical service is required for all models. Electrical service must conform to national and local electrical codes. Refer to equipment nameplate regarding wire size and circuit protection requirements. Refer the appropriate submittal drawing, listed in Table 6.1 on the next page, for electrical service entrances into unit A manual electrical disconnect switch should be installed in accordance with local codes and distribution system.
  • Page 44 CANbus cable connections between indoor unit, 1 Liebert® MC condenser and optional DPN003284 Liebert® EconoPhase pump CANbus cable connections between indoor unit, 2 Liebert® MC condensers and optional DPN002361 Liebert® EconoPhase pump Unit-to-Unit Networking DPN004351 Liebert® iCOM Unit-to-unit Network Connections Vertiv | Liebert® DSE™ Installer/User Guide...

  • Page 45: Ec Fans And Plenums

    7 EC FANS AND PLENUMS Depending on the air-distribution options of your unit, you may have EC fans and/or plenums to install. 7.1 Downflow Units with EC Fans DSE downflow models are equipped with EC fans that may operate in the fully-raised position or lowered into the floor stand for increased efficiency from reduced air resistance.
  • Page 46 6. Remove the six 1/2” hex head screws. Retain the hardware for later use. Figure 7.1 Lowering EC fans into floor stand, steps through Vertiv | Liebert® DSE™ Installer/User Guide...

  • Page 47: Downflow Units With Filter Plenums And Upflow-Unit Plenums With Ec Fans

    7. Using the jack, lower the fan module slowly until it rests on the frame of the unit. NOTICE Risk of equipment snagging cables and wiring. Can damage the unit wiring and components. Carefully monitor the position of the EC-fan wire harnesses and other parts while lowering the fan to be sure that they are not caught or pinched.

  • Page 48: Upflow Unit Plenums With Ec Fans

    EC fans on upflow units are mounted external to the unit in a factory-provided plenum. The plenum distributes air to the conditioned space through adjustable, double-deflection grilles, or connects with field-supplied ductwork. Read all instructions before installing plenums and EC fans. Vertiv | Liebert® DSE™ Installer/User Guide...

  • Page 49: Checklist For Completed Installation

    8 CHECKLIST FOR COMPLETED INSTALLATION 8.1 Moving and Placing Equipment Unpack and check received material. 2. Proper clearance for service access has been maintained around the equipment. 3. Equipment is level and mounting fasteners are tight. 4. If equipment has been disassembled for installation, unit must be reassembled per instructions. 8.2 Electrical Installation Checks Supply voltage and phase matches equipment nameplate.
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  • Page 51: Initial Start-Up Checks And Commissioning Procedure For Warranty Inspection

    9 INITIAL START-UP CHECKS AND COMMISSIONING PROCEDURE FOR WARRANTY INSPECTION WARNING! Arc flash and electric shock hazard. Open all local and remote electric power-supply disconnect switches, verify with a voltmeter that power is Off and wear appropriate, OSHA-approved personal protective equipment (PPE) per NFPA 70E before working within the electric control enclosure.
  • Page 52 This information must be completed and forwarded to validate warranty. • Contact your local sales representative or technical support if you have any questions or problems during unit start-up and commissioning. Visit https://www.vertivco.com/en- us/support/ or call 1-800-543-2778 for contacts. Vertiv | Liebert® DSE™ Installer/User Guide...

  • Page 53: Maintenance

    See the Liebert®iCOM™ user manual, SL-31075, for instructions on using the controller to predict some service maintenance intervals. • We recommend the use of trained and authorized service personnel, extended service contracts and factory-specified replacement parts. Contact your Vertiv sales representative. 10 Maintenance...

  • Page 54: Filters

    Pleat direction is non-standard. Use only short-pleat filters (see Figure 10.2 on the facing page). Long-pleat filters are subject to collapse at high airflows. To maximize the performance and reliability of the equipment, use only Vertiv filters. Contact your Vertiv representative to order replacement filters.

  • Page 55: Filter-Replacement For Upflow Units

    5. Start the blower and turn the switch counterclockwise until the alarm is energized. 6. Turn the adjusting knob one turn clockwise or to the desired filter change point. Figure 10.1 Proper filter pleat direction Item Description Short pleat construction Long pleat construction 10.1.2 Filter-replacement for Upflow Units Disconnect power from the unit.

  • Page 56: Blower Drive System-Ec Fans

    20 seconds once the motor is at a standstill. The motor also provides locked rotor protection, undervoltage/phase failure detection and motor current limitation. These conditions will display an alarm through the Liebert® iCOM. Vertiv | Liebert® DSE™ Installer/User Guide...

  • Page 57: Fan Impellers And Bearings Maintenance

    Any safety hazards stemming from the device must be re-evaluated once it is installed in the end device. Do not make any modifications, additions or conversions to the fan assembly without the approval of Vertiv. WARNING! Risk of electric shock. Can cause serious injury or death. Open all local and remote electric power-supply disconnect switches and verify with a voltmeter that power is off before opening the fan motor electric-connection enclosure.
  • Page 58 Check resistances across the phases at the KL1 connector and note them in the following table.. NOTE: Power wires must be removed from the motor for resistance test. L1 - L2 L2 - L3 L1 - L3 • Resistances should be similar for all 3 readings. Vertiv | Liebert® DSE™ Installer/User Guide...
  • Page 59 • Resistance readings should be greater than 2 Ohm. • Check all connections. Make sure connections are on the wire strand and not on the wire insulation. • Replace Fuses. • Check mains voltage at each phase (phase to ground) at the KL1 connector. Confirms phase failure not present.

  • Page 60: Removing Ec Fans From Downflow Units

    Remove panels from the front of the unit. 2. Remove the humidifier pan. You can remove fans without removing the humidifier pan, but removing it makes fan removal easier, see Figure 10.3 on the facing page. Vertiv | Liebert® DSE™ Installer/User Guide...
  • Page 61 Figure 10.3 Humidifier pan removal Item Description Humidifier pan 3. If the fan module is raised and in the unit, proceed to step 6. – or – If the fan module is lowered into the floor stand, refer to Figure 10.4 below and before removing any hardware, center the factory-supplied jack between the tabs on the jack support.
  • Page 62 Figure 10.6 on the facing page. • A suitable fan-removal device is two lengths of rigid material that is 4 inches (100 mm) wide and strong enough to support the weight of the fan module. Vertiv | Liebert® DSE™ Installer/User Guide...

  • Page 63: Removing Ec Fans From Upflow Units

    7. Disconnect high-voltage and low-voltage fan-motor wiring from the fan-motor electric component inside the electric panel. Cut cable ties as needed. 8. Using the removal device shown inserted in Figure 10.6 below, slide the fan module out through the front of the unit. 9.
  • Page 64 2. Locate the 6 places where the EC-fan assembly attaches to the unit, Figure 10.8 below, and remove the bolts, washers and spacers, Figure 10.9 on the facing page. Figure 10.8 Assembly in place on the unit Item Description Mounting holes Vertiv | Liebert® DSE™ Installer/User Guide...
  • Page 65 Figure 10.9 Bolts, washers and spacers on EC-fan assembly (6 places) Item Description Bolt Washer Spacer 10 Maintenance...
  • Page 66 Figure 10.10 below. 5. Use the lifting device to lower the EC-fan assembly for transport to service or maintenance area. Figure 10.10 EC-fan assembly moved onto lifting device Vertiv | Liebert® DSE™ Installer/User Guide...

  • Page 67: Infrared Humidifier Maintenance

    10.3 Infrared Humidifier Maintenance During normal humidifier operation, deposits of mineral solids will collect in humidifier pan and on the float switch. These must be cleaned periodically to ensure proper operation. Frequency of cleaning must be locally established since it is dependent on humidifier usage and local water quality. A spare pan is recommended to reduce maintenance time at unit.

  • Page 68: Changing Humidifier Lamps

    9. Wrap lead wires once around new lamp’s metal ends. This will support lamp and allow for thermal expansion. Insert lead wires into junction block and torque screws to 30 in-lb. 10. Reassemble by reversing steps through 9. Vertiv | Liebert® DSE™ Installer/User Guide...

  • Page 69: Condensate-Drain And Condensate-Pump System Maintenance

    Figure 10.12 Infrared humidifier lamps Item Description Infrared bulbs 10.4 Condensate-drain and Condensate-pump System Maintenance 10.4.1 Condensate Drain Check for and clear obstructions in tubing during routine maintenance. 10.4.2 Condensate Pump WARNING! Risk of electric shock. Can cause injury or death. Open all local and remote electric power-supply disconnect switches and verify that power is Off with a voltmeter before working within the condensate pump electrical connection enclosure.

  • Page 70: Electronic Expansion Valve (Eev) Maintenance

    Do not mix polyolester (POE) and mineral-based oils. • Do not mix oils of different viscosities. • Consult Vertiv technical support or the compressor manufacturer if questions arise. Table 10.3 Compressor oil types for R-410A Refrigerant Compressor Type Oil Type Copeland Scroll and Digital Scroll POE Oil - ISO 32 Centistoke Viscosity 1.

  • Page 71: Rotalock Valve

    System side of valve 10.7.3 Replacement Compressors Replacement compressors are available through your Vertiv sales office. If the unit is under warranty, the replacement compressor must be obtained from and the original compressor returned to your local Vertiv sales office. Compressors are shipped in reusable packaging, and the original compressor should be returned in the same packaging.

  • Page 72: Replacing The Compressor

    (suction) temperatures between System 1 and System 2. The outer A-coil (System 1) will operate at a higher evaporator temperature than the inner A-coil (System 2) when operating at the same compressor loading. The DA050 is a single-circuit A-frame coil. Vertiv | Liebert® DSE™ Installer/User Guide...

  • Page 73: Air-Cooled Condenser Maintenance

    10.9 Air-Cooled Condenser Maintenance Restricted airflow will reduce operating efficiency and could result in high compressor-head pressure and loss of cooling. • Clear coil surface of all debris that will inhibit airflow. • Check for bent or damaged coil fins and correct. •...
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  • Page 75: Preventive Maintenance Checklist

    11 PREVENTIVE MAINTENANCE CHECKLIST Source: DPN002952, Rev. 4 Inspection Date Job Name Indoor Unit Model # Indoor Unit Serial Number # Condenser/Drycooler Model # Condenser/Drycooler Serial # Room Temperature/Humidity °                     % Ambient Temperature ° Not all units will have all components. To determine your unit’s configuration, compare the Indoor Unit Model # above above and the information in the Components and Nomenclature section.
  • Page 76 4. Check/Test CAN connection between indoor and outdoor units (if equipped) Refrigeration Piping Check refrigerant lines (clamps secure/no rubbing/no leaks) 2. Check for moisture (sight glass) 3. Check for restriction temperature drop across filter drier Vertiv | Liebert® DSE™ Installer/User Guide...
  • Page 77 Compressor Section Check oil level 2. Check for oil leaks 3. Check compressor mounts (springs/bushings) 4. Cap tubes (not rubbing) 5. Check/Re-torque wire connections (inside compressor box) 6. Compressor operation (vibration/noise) 7. Check crank-case heater fuses/operation 8. Check for refrigerant leaks 9.
  • Page 78   #15 L1   #16 L1 Liebert® EconoPhase Pumped-refrigerant Economizer (if equipped) Check for refrigerant leaks 2. Check/Re-torque wire connections 3. Check contactors for pitting (replace if pitted) 4. Verify pump-speed control operation 5. Check pump mounting Vertiv | Liebert® DSE™ Installer/User Guide...
  • Page 79 MAINTENANCE NOTES Name Signature Company Make photocopies for your records. Compare readings/information to previous maintenance worksheet. To locate your local Vertiv representative for Vertiv-engineered parts, check https://www.vertivco.com/en-us/support/ or Call 1-800-543-2778. 11 Preventive Maintenance Checklist...
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  • Page 81: Appendices

    APPENDICES Appendix A: Technical Support and Contacts A.1 Technical Support/Service in the United States Vertiv™ Corporation 24x7 dispatch of technicians for all products. 1-800-543-2378 Liebert® Thermal Management Products 1-800-543-2778 Liebert® Channel Products 1-800-222-5877 Liebert® AC and DC Power Products 1-800-543-2378 A.2 Locations...
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  • Page 83: Appendix B: Disassembling The Dse For Transport

    Appendix B: Disassembling the DSE for Transport The Liebert® DSE has a modular frame construction that allows separating the unit into three sections. Each of these sections is more easily maneuvered through tight spaces or placed in small elevators. A qualified service technician with the required tools and recommended assistance can disassemble an air-cooled unit in about four hours, assuming refrigerant evacuation is not required.
  • Page 84 7. Pull the conduit and wires into the compressor compartment. 8. Disconnect the fan motor wire harness from the bottom of the contactor in the electric box. 9. Pull the conduit and wires into the bottom section of the DSE. 10. Reheat—Optional Component Vertiv | Liebert® DSE™ Installer/User Guide...
  • Page 85 a. Disconnect the reheat wire harness from the bottom of the contactor in the electric box. b. Unplug the low-voltage quick connect for the reheat safety wires. c. Pull the conduit and wires into the unit’s blower and coil assembly section. 11.
  • Page 86 3. Reattach the evaporator top cover plate; there are eight screws on each side. 4. Reattach the filter support plate to the filter and electric-box assembly; there is one screw on each side. 5. Reattach the tags to the Schrader fittings on top of the coil headers. Vertiv | Liebert® DSE™ Installer/User Guide...
  • Page 87 6. Replace the compressor section. Insert all compressor thread-cutting bolts before tightening any of the bolts. 7. Reinstall the pull bar to support the accent panel. 8. Reattach the low-voltage plugs in the compressor section. 9. Reconnect the wiring for the compressor, fan motor, reheat, humidifier, condensate pump, smoke detector and air sail switch.
  • Page 88 NOTE: We do not recommend un-sweating refrigerant connections. 12. Immediately cap and seal all piping that has been cut, including the suction and liquid lines. Vertiv | Liebert® DSE™ Installer/User Guide...
  • Page 89 Removing Compressor Assembly for Downflow DA125, DA150 and DA165 Secure the compressor wire harness to the compressor assembly. 2. Remove the 20 thread-cutting bolts holding the compressor section assembly to the filter and electric-box assembly and the blower and coil assembly. There are eight bolts in the front, eight in the back and four in the bottom of the unit. a.
  • Page 90 14. Remove the pull bar that supports the accent panel from the left end of the unit, otherwise it will fall out when the compressor section is removed. 15. Evacuate and recover all refrigerant from the DSE. Air-cooled units are shipped with a nitrogen holding charge. Vertiv | Liebert® DSE™ Installer/User Guide...
  • Page 91 NOTICE Risk of compressor oil contamination with moisture. Can cause equipment damage. We recommend front-seating the compressor service valves. Front-seating the valves keeps the nitrogen or refrigerant charge in the compressor and prevents moisture from contaminating the compressor oil. 16. Cut the insulation and pull it back from the piping. 17.
  • Page 92 4. Coil access plates on left replaced 5. Motor access plate on right side replaced 6. Suction and liquid refrigerant lines brazed 7. Vacuum pulled and unit checked for leaks 8. Unit recharged 9. Filters replaced 10. Panels replaced Vertiv | Liebert® DSE™ Installer/User Guide...

  • Page 93: Appendix C: Submittal Drawings

    Appendix C: Submittal Drawings The submittal drawings are in the order of document part number (DPN). Table C.1 below, groups the drawings by topic/application. Table C.1 Submittal-drawings Contents Document Number Title Component Location DPN003452 Component Location, Typical, Downflow Models DPN003451 Component Location, Typical, Upflow Models Planning Dimensions - Downflow Units DPN003533...
  • Page 94 Liebert® iCOM Unit-to-unit Network Connections Disassembly Dimensions - Downflow Units DPN003532 Disassembly, DA050 DPN003140 Disassembly, DA080 and DA085 DPN003178 Disassembly, DA125, DA150 and DA165 Disassembly Dimensions - Upflow Units DPN003166 Disassembly, DA080U and DA085U Vertiv | Liebert® DSE™ Installer/User Guide...
  • Page 95 LIEBERT DSE PRIMARY CONNECTION LOCATIONS DOWNFLOW AIR COOLED DA125 MODELS WITH AND WITHOUT ECONOPHASE ALL DIMENSIONS FROM REAR CORNER OF UNIT INCLUDING PANELS 12 1/8" 2 3/4" 68mm 308mm 3 3/8" 86mm G1 G2 L1L2 19" 483mm 47" 1193mm EC Fan...
  • Page 96 LIEBERT ECONOPHASE UNIT ARRANGEMENT DIAGRAM CONDENSER AND DUAL CIRCUIT ECONOPHASE UNIT TOP VIEW CIRCUIT 1 CIRCUIT 2 LIQUID LINE TO ECONOPHASE UNIT FROM BOTTOM Air Cooled Condenser Air Cooled Condenser OF RECEIVER CIRCUIT 2 42" CIRCUIT 1 1067mm Minimum Entering Hot Gas Line Entering Hot Gas Line Clearance TOP VIEW...
  • Page 97 3. Schematic representation shown. Do not use for specific connection locations. 4. The outlet of the receiver must be higher than the elevation of the EEV inside the indoor unit. This vertical height must not exceed 60ft. (18.3m). Liebert DSE Receiver required for systems with or without EconoPhase.
  • Page 98 LIEBERT DSE CANbus & INTERLOCK CONNECTIONS USING 2 LIEBERT MC CONDENSERS & OPTIONAL ECONOPHASE UNIT ECONOPHASE CONTROL ECONOPHASE CONTROL BOARD DUAL CIRCUIT BOARD SINGLE CIRCUIT FACTORY WIRING BETWEEN (FACTORY SET) (FACTORY SET) CONTROL BOARDS AND CIRCUIT ONE CIRCUIT ONE TERMINAL STRIP.
  • Page 99 LIEBERT DSE CANbus & INTERLOCK CONNECTIONS USING 2 LIEBERT MC CONDENSERS & OPTIONAL ECONOPHASE UNIT COMPONENT NOTES: 1. COMPONENT APPEARANCE, ORIENTATION , AND POSITION MAY VARY BETWEEN PRODUCT LINES. TERMINAL NAMES AND CALLOUTS REMAIN CONSTANT. 2. ALL CIRCUITS TO THESE CONNECTION POINTS ARE CLASS 2.
  • Page 100 3. Schematic representation shown. Do not use for specific connection locations. 4. The outlet of the receiver must be higher than the elevation of the EEV inside the indoor unit. This vertical height must not exceed 60ft. (18.3m). Liebert DSE Receiver required for systems with or without EconoPhase unit.
  • Page 101 LIEBERT DSE CABINET DIMENSIONAL DATA UPFLOW DA080-DA085 2 3/8" 14" 59mm 356mm Secondary Refrigerant 4" Piping Entrance 1 7/8" 102mm 48mm 33" 838mm 34 3/4" 883mm Minimum required for blower replacement 3/8" Bezel High Volt Connection(s) Top View Low Volt Connection(s) 100"...
  • Page 102 LIEBERT DSE PRIMARY CONNECTION LOCATIONS UPFLOW DA08-DA085 14" 356mm ALL DIMENSIONS FROM REAR CORNER OF UNIT INCLUDING PANELS 4" 102mm EC FAN OUTLET L1 L2 G1 G2 5" 35" 127mm 889mm E1 E2 14 7/8" 379mm 100" 2540mm FRONT OF UNIT Top View 6"...
  • Page 103 LIEBERT DSE DISASSEMBLY DIMENSIONAL DATA DOWNFLOW DA080-DA085 FILTER & ELECTRIC BOX ASSEMBLY 39" 991mm COMPRESSOR ASSEMBLY BLOWER & COIL ASSEMBLY 76" 1930mm Assembled Height 76" 1930mm 59 7/16" 1510mm 37" 940mm 17" 82" 432mm 2083mm 33" 838mm 99" Assembled Length...
  • Page 104 LIEBERT DSE DISASSEMBLY DIMENSIONAL DATA UPFLOW DA080-DA085 ELECTRIC BOX ASSEMBLY 31 1/4" 794mm COMPRESSOR ASSEMBLY 76" 1930mm FILTER & COIL ASSEMBLY Assembled Height 76" 1930mm 45 13/16" 1163mm 17" 82" 33" 432mm 2083mm 838mm 99" Assembled Length 2515mm APPROXIMATE DRY WEIGHT lb (kg) (Includes Panels)
  • Page 105 LIEBERT DSE CABINET DIMENSIONAL DATA DOWNFLOW AIR COOLED DA125, DA150 & DA165 MODELS Filter Plenum Shipped separately Filters are removed thru Secondary Refrigerant front of plenum Piping Entrance 2 5/8" 19" 67mm 483mm 48" 7" 1219mm 117 11/16" 178mm 2989mm Opening 3 3/8"...
  • Page 106 LIEBERT DSE FLOORSTAND DIMENSIONAL DATA DOWNFLOW AIR COOLED DA125, DA150 & DA165 MODELS 140 1/2" 3569mm Center of Feet Piping Access Area 43 1/2" 1105mm Center of Feet 44" Typ. (3) Places 36" 1118mm 914mm Center of Feet 1" Center of Feet 25mm Typ.
  • Page 107 LIEBERT DSE DISASSEMBLY DIMENSIONAL DATA DOWNFLOW AIR COOLED DA125, DA150 & DA165 FILTER ASSEMBLY 18" 457mm ELECTRIC BOX ASSEMBLY 40 11/16" 1034mm 94" 2388mm ASSEMBLED HEIGHT COMPRESSOR ASSEMBLY BLOWER & COIL ASSEMBLY 74 3/16" 1884mm 76" 1930mm 35" 889mm 45"...
  • Page 108 LIEBERT DSE CANbus & INTERLOCK COMMUNICATIONS USING 1 LIEBERT MC CONDENSER & OPTIONAL ECONOPHASE UNIT ECONOPHASE ECONOPHASE FACTORY WIRING BETWEEN CONTROL BOARD CONTROL BOARD SINGLE CIRCUIT DUAL CIRCUIT CONTROL BOARDS AND (FACTORY SET) (FACTORY SET) TERMINAL STRIP. CIRCUIT ONE CIRCUIT ONE...
  • Page 109 LIEBERT DSE CANbus & INTERLOCK COMMUNICATIONS USING 1 LIEBERT MC CONDENSER & OPTIONAL ECONOPHASE UNIT COMPONENT NOTES: 1. COMPONENT APPEARANCE, ORIENTATION , AND POSITION MAY VARY BETWEEN PRODUCT LINES. TERMINAL NAMES AND CALLOUTS REMAIN CONSTANT. 2. ALL CIRCUITS TO THESE CONNECTION POINTS ARE CLASS 2.
  • Page 110 LIEBERT DSE COMPONENT LOCATION DIAGRAM DA080U & DA085U Typ. 1. iCOM Control Display 7. Disconnect 2. Electric Box 8. Condensate Pump (optional) 3. Filters (not shown for clarity) 9. Smoke Sensor (optional) 4. Evaporator Coil 10. EC Fans 5. Compressor Section 11.
  • Page 111 LIEBERT DSE COMPONENT LOCATION DIAGRAM DA050 - DA165 1. iCOM Control Display 7. Infrared Humidifier (optional) 2. Electric Box 8. Disconnect (optional) 3. Filter Plenum (not shipped with unit) 9. Condensate Pump (optional) 4. Evaporator Coil 10. Smoke Sensor (optional) 5.
  • Page 112 LIEBERT DSE PLENUM DIMENSIONAL DATA DOWNFLOW DA050-DA085 MODELS Plenum Return air inlet opening B Opening C Opening 32 1/8" Opening 7/8" 816mm Typ. 22mm 34" 864mm Hinged door for filter access 12" 1" 305mm 25mm 76" 1930mm Height in (mm)
  • Page 113 LIEBERT DSE PRIMARY CONNECTION LOCATIONS DOWNFLOW DA050 ALL DIMENSIONS FROM REAR CORNER OF UNIT INCLUDING PANELS FRONT VIEW SECTION A-A 5" 35" 127mm EC FAN 889mm OUTLET 15" 381mm E1 E2 FRONT OF UNIT 4.50" 114mm 77" 1956mm POINT DESCRIPTION X in.
  • Page 114 LIEBERT DSE DISASSEMBLY DIMENSIONAL DATA DOWNFLOW DA050 FILTER & ELECTRIC BOX ASSEMBLY 39" 991mm 76" BLOWER & COIL ASSEMBLY 1930mm COMPRESSOR ASSEMBLY Assembled Height 76" 59 7/16" 1930mm 1509mm 37" 940mm 59" 17" 1499mm 33" 432mm 838mm 76" Assembled Length...
  • Page 115 LIEBERT DSE CABINET DIMENSIONAL DATA DOWNFLOW DA050 AIR COOLED Secondary Refrigerant Piping Entrance 2 3/8" 14" 60mm 356mm 56 7/8" Opening 4" 1445mm 1 7/8" 102mm 48mm Note: 1. Filters are accessible through top of unit only. 33" 2. Downflow electrical 838mm 24 3/8"...
  • Page 116 LIEBERT ECONOPHASE UNIT ARRANGEMENT DIAGRAM CONDENSER & SINGLE CIRCUIT ECONOPHASE UNIT TOP VIEW Air Cooled Condenser 42" Entering Hot Gas Line 1067mm Minimum Clearance TOP VIEW Liquid from Condenser 1-3/8". DO NOT TRAP LINE! Slope (2 in. per 10 ft.) down towards EconoPhase unit.
  • Page 117 LIEBERT DSE AIR COOLED PIPING SCHEMATIC LIEBERT MC MOUNTED ABOVE LIEBERT DA050-165 Notes: 1. The outlet of the receiver must be higher than the elevation of the EEV 1-3/8 inch minimum diameter Liquid line. inside the indoor unit. If the vertical height is greater than 60 ft (18.3m)
  • Page 118 LIEBERT DSE AIR COOLED PIPING SCHEMATIC LIEBERT MC AND LIEBERT DA050-165 AT SIMILAR LEVELS 1-3/8 inch minimum diameter Liquid line. DO NOT TRAP LINE! Slope 2 inch per 10 ft (167mm per 10 meter) down towards EconoPhase unit. Single Circuit system shown for clarity.
  • Page 119 LIEBERT DSE PRIMARY CONNECTION LOCATIONS DOWNFLOW AIR COOLED DA150 & DA165 MODELS ALL DIMENSIONS FROM WITH AND WITHOUT ECONOPHASE REAR CORNER OF UNIT INCLUDING PANELS 3 3/8" 86mm L1 L2 G1G2 19" 483mm 47" Blower Blower 1193mm Blower Outlet Outlet...
  • Page 120 1" (25mm). 3. The floorstand used with EC units is not symmetrical and its orientation to the Liebert DSE is critical for lowering the EC fans. Unless the floor stand is installed in Height in ( mm ) the correct position, the blowers will not lower into the floorstand.
  • Page 121 7 (178) 3. The floorstand used with EC units is not symmetrical and its orientation to the Liebert DSE is critical for lowering the EC fans. Unless the floorstand is installed in 18 (457) the correct position, the blowers will not lower into the floorstand.
  • Page 122 LIEBERT DSE PRIMARY CONNECTION LOCATIONS DOWNFLOW DA080-DA085 SCROLL OR DIGITAL SCROLL COMPRESSOR MODELS All dimensions from rear corner of unit including panels L1 L2 G1 G2 EC Fan 35" EC Fan 889mm Outlet Outlet Section A-A Front of Unit 100"...
  • Page 123 LIEBERT DSE PLENUM DIMENSIONAL DATA UPFLOW 80kW-85kW W/ EC FANS Notes: 1. All Plenums to be field assembled and EC Fans wired to unit. 7/8" 2. Shaded areas indicate a recommended minimum clearance of 22mm 36" (914mm) from the bottom of the unit to the top of the plenum.
  • Page 124 LIEBERT DSE CABINET DIMENSIONAL DATA DOWNFLOW DA080-DA085 MODELS 14" 356mm Secondary Refrigerant 2 3/8" Piping Entrance 60mm 1 7/8" 80" 48mm Opening 4" 2032mm 102mm 33" 838mm 24 3/8" AIR INLET OPENING Opening 619mm 34 3/4" 883mm 1 3/4" 5/16"...
  • Page 125 LIEBERT DS, DSE, CW, PDX & PCW UNIT TO UNIT NETWORK CONNECTIONS RS485 SITE AND BMS COMMUNICATION CONNECTIONS ETHERNET DETAIL A ETHERNET CABLE (FIELD SUPPLIED) UNIT-TO-UNIT NETWORKING SWITCH (FIELD SUPPLIED) iCOM MICROPROCESSOR AND I/O BOARD TO / FROM OTHER NETWORKED UNITS P100 P95 DVI-D CABLE CONNECTION TO 7-INCH ICOM DISPLAY...
  • Page 126 LIEBERT DS, DSE, CW, PDX & PCW UNIT TO UNIT NETWORK CONNECTIONS ETHERNET CABLE (FIELD SUPPLIED) iCOM iCOM MICROPROCESSOR MICROPROCESSOR AND I/O BOARD AND I/O BOARD P100 P100 P95 DVI-D CABLE CONNECTION TO 7-INCH ICOM DISPLAY P100 POWER SUPPLY TO P95 DVI-D CABLE CONNECTION 7-INCH ICOM DISPLAY TO 7-INCH ICOM DISPLAY...
  • Page 127 10) Heat rejection interlock - On any call for compressor operation, normally open dry contact is closed across terminals 70 & 71(circuit 1), 230 (circuit 2) to heat rejection equipment. 1 AMP, 24VAC max load. Use Class 1 field supplied wiring. Liebert DSE units must be connected to Liebert MC series condenser with premium control.
  • Page 128 LIEBERT DSE ELECTRICAL FIELD CONNECTION DESCRIPTION 50kW - 85kW UPFLOW AND DOWNFLOW MODELS OPTIONAL ELECTRICAL CONNECTIONS 16) Smoke sensor alarm - Factory wired dry contacts from smoke sensor are 91-common, 92-NO, and 93-NC. Supervised contacts, 80 & 81, open on sensor trouble indication. This smoke sensor is not intended to function as, or replace, any room smoke detection system that may be required by local or national codes.
  • Page 129 LIEBERT DSE ELECTRICAL FIELD CONNECTION DESCRIPTION 50kW - 85kW UPFLOW AND DOWNFLOW MODELS OVERCURRENT PROTECTION DEVICES 60 Hz CONTACTORS CONTACTORS, RELAYS, & OVERLOAD PROTECTORS 50kW DOWNFLOW Note: Typical orientation of components shown. Component location varies by option and unit size.
  • Page 130 LIEBERT DSE ELECTRICAL FIELD CONNECTION DESCRIPTIONS DA125, DA150 & DA165 DOWNFLOW MODELS STANDARD ELECTRICAL CONNECTIONS 1) Primary high voltage entrance - 2.50” (64mm); 1.75” (44mm); 1.375” (35mm) diameter concentric knockouts located in bottom of box. 2) Primary low voltage entrance - Quantity (3) 1.375” (35mm) diameter knockouts located in bottom of unit.
  • Page 131 LIEBERT DSE ELECTRICAL FIELD CONNECTION DESCRIPTIONS DA125, DA150 & DA165 DOWNFLOW MODELS OPTIONAL ELECTRICAL CONNECTIONS 14) Smoke sensor alarm - Factory wired dry contacts from smoke sensor are 91-common, 92-NO, and 93-NC. Supervised contacts, 80 & 81, open on sensor trouble indication. This smoke sensor is not intended to function as, or replace, any room smoke detection system that may be required by local or national codes.
  • Page 132 LIEBERT DSE ELECTRICAL FIELD CONNECTIONS DA125, DA150 & DA165 DOWNFLOW MODELS OVERCURRENT PROTECTION DEVICES CONTACTORS AND RELAYS OVERLOADS Note: Typical orientation of components shown. LOW VOLT SECTION Component location varies by option and unit size. Item 11 Installation Conditions 1. Follow all local installation codes.
  • Page 133 LIEBERT DSE ELECTRICAL FIELD CONNECTIONS DA125, DA150 & DA165 DOWNFLOW MODELS Low Voltage Field Wiring Pathways High Voltage Field Wiring Pathways DPN004388 REV : 1 Page :4 /4 REV DATE : 6/18...
  • Page 134 3. Schematic representation shown. Do not use for specific connection locations. 4. The outlet of the receiver must be higher than the elevation of the EEV inside the indoor unit. This vertical height must not exceed 60ft. (18.3m). Liebert DSE Receiver required for systems with or without EconoPhase unit.
  • Page 135 Vertiv | Liebert® DSE™ Installer/User Guide...
  • Page 136 VertivCo.com | Vertiv Headquarters, 1050 Dearborn Drive, Columbus, OH, 43085, USA © 2018 Vertiv Co. All rights reserved. Vertiv and the Vertiv logo are trademarks or registered trademarks of Vertiv Co. All other names and logos referred to are trade names, trademarks or registered trademarks of their respective owners. While every precaution has been taken to ensure accuracy and completeness herein, Vertiv Co.

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